Draytek VigorAP 800 User Manual page 76

Enable Wireless LAN
Mode
Enable 2 Subnet
(Simulate 2 APs)
VigorAP 800 User's Guide
Check the box to enable wireless function.
At present, VigorAP 800 can connect to 11b only, 11g only, 11n
only, Mixed (11b+11g) and Mixed (11b+11g+11n) stations
simultaneously. Simply choose Mixed (11b+11g+11n) mode.
Check the box to enable the function for two independent
subnets. Once you enable this function, LAN-A and LAN-B
would be independent. Next, you can connect one router in
LAN-A, and another router in LAN-B. Such mechanism can
make you feeling that you have two independent AP/subnet
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